Description

4,4'-Bis(4-Amino-6-Chloro-1,3,5-Triazin-2-Ylamino)-2,2'-Stilbenedisulfonic Acid Disodium Salt is a high-value, reactive chemical intermediate featuring a stilbene core symmetrically substituted with chlorotriazine and sulfonate groups. This compound matters for its ability to act as a versatile cross-linking agent and chromophore precursor, enabling the synthesis of advanced materials with specific optical and binding properties. It is primarily needed by manufacturers in the optical brightening agent (OBA), reactive dye, and specialty polymer industries, where its unique structure facilitates the development of products with enhanced brightness, color fastness, and functional performance.

Application

• Optical Brightening Agents (OBAs/Fluorescent Whitening Agents): A key intermediate for synthesizing high-efficiency stilbene-triazine type brighteners used in paper, detergents, textiles, and plastics.
• Reactive Dyes: Serves as a critical building block for creating reactive dyes with excellent wash-fastness and brightness for cotton and cellulose fiber dyeing.
• Functional Polymers: Used in the production of specialty polymers, including light-stabilizing agents, UV-absorbing materials, and polymers with specific ionic characteristics.
• Bioconjugation & Labeling Chemistry: The reactive chlorotriazine groups allow for covalent attachment to biomolecules (proteins, antibodies) for diagnostic and research applications.
• Cross-linking Agent: Utilized in coatings, adhesives, and resin formulations to improve durability, water resistance, and mechanical properties.
• Analytical Reagents: May be employed in the synthesis of chromogenic or fluorogenic reagents for chemical detection and analysis.

Basic Information

Product Name	4,4'-Bis(4-Amino-6-Chloro-1,3,5-Triazin-2-Ylamino)-2,2'-Stilbenedisulfonic Acid Disodium Salt
CAS No.	52205-59-1
Molecular Formula	C22H14Cl2N12Na2O6S2
Molecular Weight	723.39 g/mol
Synonyms	Disodium 4,4'-bis[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate; 4,4'-Bis(4,6-dichloro-1,3,5-triazin-2-ylamino)stilbene-2,2'-disulfonic acid disodium salt (precursor form); Stilbene triazine sulfonate; Fluorescent Brightener 71 intermediate; CBS-127 intermediate; DAS Triazine intermediate; Reactive Brightener Intermediate; 2,2'-Stilbenedisulfonic acid, 4,4'-bis[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]-, disodium salt
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis(4-Amino-6-Chloro-1,3,5-Triazin-2-Ylamino)-2,2'-Stilbenedisulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and impurity profiling, IR and UV-Vis for structural confirmation, and titration for assay determination. We provide detailed Certificates of Analysis (COA) with each shipment to ensure traceability and compliance with your specifications. Our commitment to consistent quality and supply reliability supports your R&D and manufacturing processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Clear, yellow solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.